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Flowing-speed-limiting device for coal mine high-pressure filling pipeline

A technology for filling pipelines and flow limiting devices, which is applied in the direction of fillings, safety devices, pipe components, etc., can solve the problems of reduced filling slurry resistance, standpipe damage, and potential safety hazards, achieving reduced wear, cost savings, and safety Guaranteed effect

Active Publication Date: 2014-07-23
山东康格能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the coal mine filling process, as the filling project progresses, the length of the main filling line pipeline will gradually become shorter, resulting in a decrease in the resistance of the filling slurry in the pipeline, and an increase in the flow rate of the filling slurry in the pipeline. Filling pump pumping, one pumping stroke reaches 0.23m 3 , the slurry is split into the standpipe, if the flow rate of the slurry in the standpipe is too fast, there will be no slurry in the standpipe and a vacuum will be formed, and when the split slurry slides into the standpipe, the drop will be too large, causing a strong impact on the bottom of the standpipe , affecting pipeline life and normal production
In addition, the sub-strand slurry falling in the standpipe will evacuate the standpipe, causing the pipeline to vibrate severely, causing the standpipe to be often damaged, and accompanied by a large safety hazard
The traditional solution to this problem is to install a valve to limit the flow rate on the horizontal pipe under the standpipe, but the valve is often damaged due to the wear of the filling slurry in a short period of time, and needs to be replaced frequently, resulting in large waste
In addition, due to the sudden change of the pipe diameter of the valve, the pipeline will also vibrate severely. At the same time, the shear force of the valve will cause the gray-water separation of the filling slurry, and the flow performance of the dehydrated sand will change, which will cause blockage at the valve, forming A Common Security Hazard

Method used

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  • Flowing-speed-limiting device for coal mine high-pressure filling pipeline
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Examples

Experimental program
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Effect test

Embodiment 1

[0017] After the length of the filling line was shortened to 400m, the flow velocity of the filling slurry reached 1.5m / s at this time; a restrictor 1 was installed on the horizontal pipe between the riser 5 and the valve 2, and the total length is 1980mm. The thickness of the grinding layer is 4mm, the inner diameter of the restrictor 6 is gradually reduced from 179mm to 95mm, and the inner diameter of the opening 9 is 179mm. The filling slurry initially sets after 240 min after entering the filling area. The height of the filler slurry 8 in the standpipe 5 remains constant after being kept at 180m, and the pipeline is stably transported within 30 days without closing shock and pipeline blockage.

Embodiment 2

[0019] After the length of the filling trunk line was shortened to 350m, the flow velocity of the filling slurry reached 1.6m / s at this time; a flow restrictor 1 was added to the horizontal pipe between the riser 5 and the valve 2, the total length is 2200mm, the flow restrictor The thickness of the hardfacing layer on the inner wall is 5mm, the length of the restrictor is 2000mm, the inner diameter of the restrictor is gradually reduced from 195mm to 100mm, the length of the opening is 200mm, and the inner diameter is 195mm. The filling slurry initially sets 240 minutes after entering the filling area. The height of the filler slurry 8 in the riser 5 remains constant after 200 m, and the pipeline is stably transported within 30 days without closing shock and pipeline blockage.

Embodiment 3

[0021] After the length of the filling trunk line was shortened to 250 m, the flow velocity of the filling slurry reached 1.8m / s at this time; a restrictor 1 was added to the horizontal pipe between the riser 5 and the valve 2, and the total length was 2750mm. The thickness of the wear-resistant layer is 7mm, the inner diameter of the restrictor 6 is gradually reduced from 195mm to 100mm, and the inner diameter of the opening 9 is 195mm. The filling slurry initially sets 240 minutes after entering the filling area. The height of the filler slurry 8 in the riser 5 remains constant after 200 m, and the pipeline is stably transported within 30 days without closing shock and pipeline blockage.

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Abstract

The invention discloses a flowing-speed-limiting device for a coal mine high-pressure filling pipeline and belongs to the technical field of coal mine filling material pipeline conveying equipment. The flowing-speed-limiting device comprises a vertical pipe (5) in the filling main pipeline and a transverse pipe connected to the lower portion of the vertical pipe (5) and provided with a valve (2). The flowing-speed-limiting device is characterized in that a flowing-speed-liming device body (1) is arranged on the transverse pipe between the vertical pipe (5) and the valve (2), and a through hole is formed in the pipe wall of the upper portion of the vertical pipe (5). Split slurry (7) is arranged in the main pipeline connected to the top of the vertical pipe (5), and filling slurry (8) is arranged in the middle and on the lower portion of the vertical pipe (5) and in the transverse pipe connected to the lower portion of the vertical pipe (5) in a left-and-right mode due to flowing speed limiting of the flowing-speed-limiting device body (1). Due to the filling slurry (8) in the vertical pipe (5), the falling head of the split slurry (7) in the main pipeline is greatly reduced after the slurry enters the vertical pipe (5), and impact is reduced. The flowing-speed-limiting device is additionally arranged in the pipeline, so that the diameter range in which the slurry passes is reduced, flowing speed is decreased, falling speed of the slurry in the vertical pipe is limited, and the small falling head is kept.

Description

Technical field [0001] A flow limiting device for a coal mine high-pressure filling pipeline belongs to the technical field of coal mine filling material pipeline transportation equipment. Background technique [0002] During the filling process of the coal mine, with the progress of the filling project, the length of the filling trunk pipeline will gradually become shorter, resulting in a decrease in the resistance of the filling slurry in the pipeline, and the flow velocity of the filling slurry in the pipeline will increase. Filling pump pumping, one pumping stroke reaches 0.23m 3 , The slurry is divided into the riser. If the slurry flow rate in the riser is too fast, there will be no slurry in the riser and a vacuum will be formed. When the split slurry slides into the riser, the drop will be too large, which will cause a strong impact on the bottom of the riser. , Affect pipeline life and normal production. In addition, the sub-strand slurry falling in the riser pumps the ...

Claims

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Application Information

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IPC IPC(8): F16L55/027F16L55/045E21F15/00
CPCE21F15/00F16L55/027F16L55/045
Inventor 孙希奎张玉军江兆利施现院谢志鸿王业超毕智强
Owner 山东康格能源科技有限公司